Abstract: An image formation device enabling manual two-sided printing in which a user supplies the sheets, has a receiving unit, which receives printing page quantity information; a control unit, which based on the printing page quantity information determines the number of pages printed in the first pass of manual two-sided printing, issues a printing instruction for the number of pages printed, on condition that print processing has ended according to the printing instruction, issues an instruction to change image forming conditions when performing printing, and, after the change instruction, issues a printing instruction for the second pass of printing; and a printing unit, which changes the image forming conditions according to instructions to change the image forming conditions, and executes print processing according to the printing instruction.

Abstract: A printing device does not perform a flying print during a manual duplex print and performs a process for discharging a sheet of a page even when a memory deficient error or a data abnormal error arises during the process of any of pages in the manual duplex print.

Abstract: An image formation device enabling manual two-sided printing in which a user supplies the sheets, has a receiving unit, which receives printing page quantity information; a control unit, which based on the printing page quantity information determines the number of pages printed in the first pass of manual two-sided printing, issues a printing instruction for the number of pages printed, on condition that print processing has ended according to the printing instruction, issues an instruction to change image forming conditions when performing printing, and, after the change instruction, issues a printing instruction for the second pass of printing; and a printing unit, which changes the image forming conditions according to instructions to change the image forming conditions, and executes print processing according to the printing instruction.

Abstract: An error control system that allows the user to check the content of an error after the error has occurred and prevents the user from wasting paper. The system is designed for printers that continue to print when an error not requiring a stoppage of printing has occurred. When an error not requiring the printer to stop has occurred during printing, the content of an error is written into an error log, and the operation of printing subsequent pages continues. Thereafter, when the power supply of the printer is turned off and turned on again, the system checks whether or not data is present in the error log. If the data is present, the error data in the error log is printed out along with status data for the printer on a status sheet. The error log is cleared thereafter.